# coding=utf-8
# Copyright 2024 The Google Research Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""A simpler timer."""

import time


class Timer:
  """A simple timer."""

  def __init__(self):
    self._last = time.time()

  @property
  def duration(self):
    return time.time() - self._last

  def restart(self):
    now = time.time()
    duration = now - self._last
    self._last = now
    return duration
